ust months ago, disaster planners simulated a Category 4 hurricane strike alarmingly similar to the real-world scenario now unfolding on a dangerously vulnerable stretch of the East Coast. A fictional "Hurricane Cora" barreled into southeast Virginia and up the Chesapeake Bay to strike Washington, D.C., in the narrative created by the Federal Emergency Management Agency and Argonne National Laboratory. The result was catastrophic damage, which has some experts concerned that Hurricane Florence could produce a disaster comparable to 2005's Hurricane Katrina and in a part of the country that is famously difficult to evacuate.